. >> we now know at his bedside dzhokhar tsarnaev now has the right to remain silent. he will be tried in civilian court and will not be categorized as an enemy combatant which would have given them ability to interrogate him more. >> this is decided by the department of justice and attorney general. the whole national security team support this is decision. there is not an alternative for a u.s. citizen to be tried in military commission. >> some gain it as an impediment to gaining more ginls. >> i don't want to use the information against him in court. i want to collect information about future terrorist activity. we have every right to question him apart from the criminal justice system. >> investigators are toming through tamerlan's trip in the caucus region. investigators continue to probe hospit links to islamist groups including the caucuses em rit. >> those are fighting in syria iraq pakistan and afghanistan. in 2007 a guy threatened the united states of america directly. >> some believe despite yesterday's reading of his miranda rights the federal government s